The main function of a leaf is to produce food for the plant by photosynthesis. Chlorophyll, the substance that gives plants their characteristic green colour, absorbs light energy. The internal structure of the leaf is protected by the leaf epidermis, which is continuous with the stem epidermis.
Conifer Leaf.
Microphyll Leaf.
Megaphyll Leaf.
A leaf is an above-ground plant organ and it is green. Its main functions are photosynthesis and gas exchange. A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which open and close.
The two main functions performed by the leaf are photosynthesis and transpiration. Photosynthesis is the process by which green plants make their food from carbon dioxide and water in the presence of sunlight.
~Answer~
~Absorb carbon dioxide~
~Perform Photosynthesis~
~Release oxygen~
~Yw~
~and Brainliest are welcome~
~Emmi~
Afferont neurons
a.transmit sensory input to the CNS
b.are multipolar neurons
c.have many dendrites and a single long axon
d.are found only within the brain and spinal cord
Answer:
a.transmit sensory input to the CNS
Explanation:
Afferent neurons will take input from your muscles, skin etc. and send it to your CNS (usually via spinal nerves).
When an organism encounters nitrate in its environment, which condition will determine whether the nitrate is used in an assimilatory or dissimilatory manner?
a. low concentration or ammonia
b. low concentration of sulfate
c. oxygen present
d. low temperature
e. oxygen absent
f. high concentration of nitrite
Answer:
Dissimilatory- oxygen absent
Assimilatory- high concentration of nitrite
Explanation:
In assimilatory nitrate reduction, ammonium is produced and subsequently incorporated into biomass to build up e.g., proteins and nucleic acids. Dissimilatory nitrate reduction is a process for energy conservation, in which nitrate is used as an electron acceptor in the (near) absence of oxygen . Dissimilatory nitrate reduction and nitrate storage in particular are physiological life traits that provide microbes with environmental flexibility (i.e., metabolic activity under both oxic and anoxic conditions) and resource independence (i.e., anaerobic metabolism without immediate nitrate supply), respectively. Such life traits are especially important in environments that are temporarily anoxic and/or nitrate-free and they may have developed as a “life strategy” in both prokaryotes and eukaryotes
Select the correct answer
Which term refers to the maximum number of organisms of a particular species that can be supported by an environment?
OA Population density
OB Exponential growth
OG carrying capacity
Answer:
Carrying capacity
Explanation:
Carrying capacity means the number of organisms that a region can support without environmental degradation.
How is the evidence for the multi-regional theory of migration supported?
How does water relate to the ability of a living thing to generate usuable energy?
Answer:
Without the proper balance of water, chemical reactions in cells could not take place.
Explanation: :)
When blood pH becomes overly acidic, respiration and kidney function change to bring the acidity back to its normal pH level of 7.4. What does this process best exemplify
Answer:
homeostasis
Explanation:
Homeostasis has to do with processes that maintain the internal balance within an organism. It can succinctly be defined as the process of regulating an organism's internal environment. The process of homeostasis is very important in the maintenance of important indicators of balance in the body such as body temperature, body pH, etc.
Hence, when blood pH becomes overly acidic, respiration and kidney function change to bring the acidity back to its normal pH level of 7.4. This is a homeostatic response.
What would be the most likely candidate for a complete transmembrane segment of a protein in the lysosomal membrane?
Answer:
Alpha-helical and beta-barrels.
Explanation:
Alpha-helical and beta-barrels are the types of transmembrane protein and both are most likely candidate for a complete transmembrane segment of a protein in the lysosomal membrane. A transmembrane protein (TP) is a type of membrane protein that spread in the whole cell membrane. Transmembrane proteins act as gateways that permit the transport of specific substances across the membrane of the cell.
A 45-year-old woman named Christine is measured as having the following skinfold thicknesses on the right side of her body: Triceps: 14mm; Thigh: 32mm; Suprailium: 28mm. Estimate her body fat percentage.
Answer:
The skinfold method, the measurement of subcutaneous fat folds, is the most widely adopted field method for the assessment of body fat, especially in children.
It is based on the principle that fat is of a known density and by “summing” measurements of subcutaneous fat thickness across the body, total and regional fat can be estimated.
Skinfold thickness measurements are typically used to rank individuals in terms of relative total “fatness”, or to assess subcutaneous fat at various regions of the body.
Population specific equations are used to derive estimates of percent body fat.
In infancy, it might be the sole tool available for assessing body composition longitudinally as other methods may not be feasible, or may only be suitable for use at body sizes e.g. PEA POD, can only measure infants up to 10kg.
The most generally used field method for determining body fat, particularly in kids, is the skinfold method, which involves measuring subcutaneous fat folds.
What is skinfold method?Skinfold method is defined as a method for determining how much body fat there is. It entails delicately pinching the skin and underlying fat in several locations using a tool called a caliper. To acquire precise findings using this quick and easy body fat estimation technique, a high level of competence is needed.
It is based on the idea that since subcutaneous fat thickness measurements may be "summed" to estimate total and regional fat because subcutaneous fat has a known density. Measures of skinfold thickness are widely used to categorize individuals based on their relative degrees of overall "fatness" or to assess subcutaneous fat in various bodily regions. Estimates of the percent body fat are derived using equations that are specific to a population.
Thus, the most generally used field method for determining body fat, particularly in kids, is the skinfold method, which involves measuring subcutaneous fat folds.
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During the process of DNA replication, the whole molecule gets copied in the [A] phase of the cell cycle. The DNA strands are separated by the enzyme [B] while [C] keeps it from overwinding. The 2 strands are copied differently. The [D] strand is made continuously, while the [E] strand is synthesized in small sequences called Okazaki fragments. The main enzyme involved in DNA replication is [F]. This enzyme can only add nucleotides to an existing strand, so short sequences of [G] made by the enzyme [H] are needed for the process of elongation. In the [U] strand, the enzyme DNA polymerase one removes the short tj sequences and fills the gaps, while [K] joins the fragments.
Answer:
Synthesis, DNA helicase, topoisomerase, leading strand, lagging strand, DNA polymerase, nucleotides, primase, lagging strand, nucleotide, DNA ligase
Explanation:
During the process of DNA replication, the whole molecule gets copied in the synthesis or S phase of the cell cycle. The DNA strands are separated by the enzyme helicase while topoisomerase keeps it from overwinding. The 2 strands are copied differently. The leading strand is made continuously, while the lagging strand is synthesized in small sequences called Okazaki fragments. The main enzyme involved in DNA replication is DNA polymerase. This enzyme can only add nucleotides to an existing strand, so short sequences of nucleotides (primer) made by the enzyme primase are needed for the process of elongation. In the lagging strand, the enzyme DNA polymerase one removes the short tj sequences and fills the gaps, while DNA ligase joins the fragments.
A Synthesis,
B DNA helicase,
C topoisomerase,
D leading
E lagging strand
F DNA polymerase
G nucleotides
H primase
I lagging strand
J nucleotide
K DNA ligase
explain what makes psychology a science.
Psychology is a science because it follows the empirical method. ... We can directly observe and carefully measure externals such as what a person does, says, and marks down on a psychological test. We cannot directly observe a person's mind (e.g., internal thoughts, emotions).
In the experiment on stimulation of the isolated sciatic nerve, a compound action potential is produced. This represents _______
Answer: A summed electrical activity of all axons in the nerve
Explanation:
During the experiment with regards to the stimulation of the isolated sciatic nerve, a compound action potential is produced. It should be noted that this represents the summed electrical activity of all axons in the nerve.
Here, the summed electrical activity of all axons in the nerve represents the sum of the potentials that were recruited in the experiment.
Scientists think that red pandas and raccoons share a more recent common
ancestor than red pandas and giant pandas do. If this is true, what would you
expect to be true about the genetic sequences in these organisms?
O A. Red pandas and raccoons must have identical DNA sequences.
B. The DNA sequences of giant pandas are likely to be more similar
to the sequences of raccoons than of red pandas.
C. Red pandas must have a different genetic code than giant pandas.
O D. The DNA sequences of red pandas are likely to be more similar to
the sequences of raccoons than of giant pandas.
Answer:
D seems to be best answer if that was my test
Explanation:
makes the most sense
Answer:
D
Explanation:
3. In biological terms are you a
producer or a consumer? Explain
your answer.
Answer:
consumer
Explanation:
because we get things from living things
Natural selection is most likely to be the cause of a change in a population's
allele frequencies when:
A. the ecosystem experiences few disturbances,
B. the population drops below its carrying capacity.
C. the predators are removed from the ecosystem,
D. the population has reached its carrying capacity.
PLEASE HELP URGENT
Answer:handheld c
Explanation:bend c smlOc
What is the correct sequence of events for the life cycle of the pork tapeworm, T. solium? Arrange the following statements in chronological order
Answer: See explanation
Explanation:
The correct sequence of events for the life cycle of the pork tapeworm, T. solium in chronological order will be:
• Eggs are produced by adult tapeworms living in definitive host
• Eggs are released in the environment in the faeces
• Pigs eat grass contaminated, or fertilized with human faeces.
• Inside the intermediate hosst, the eggs mature into larvae and encyst in the host muscles.
• The definitive host ingests the larvae and becomes infected.
Which quantity does a light year measure
Answer:
distance = 9.46 trillion kilometers
Explanation:
Light years measure distance and is a unit that equals the distance light travels through space in one year on Earth (365 days) and is used as way to measure extremely vast distances in outer space. It equals 9.46 trillion kilometers.
How can we get more food for ourselves without damaging other animals' food chains?
Answer:
it's simple We have to crop the vegetables .
Do you think that Neanderthals deserve the sometimes negative public image they have?
Answer:
No.
Explanation:
Neanderthals are portrayed as idiotic animals while in reality they are the beginning of our civilizations. While yes we are far more advanced then they were back then they are still our beginning roots and were smart enough to take the first steps towards advancement causing us to be where we are now :)
The following statement is incorrect as stated "Pesticides create pesticide resistance in mosquitoes." Rewrite this sentence so that it is a more accurate statement of what actually occurs when pesticides are used. Why is this concept important to know in trying to control outbreaks of mosquito transmitted diseases such as eastern equine encephalitis (also known as Triple E)?
Answer:
Mosquitoes usually become resistant to pyrethroids through the mutation of a sodium channel gene that controls the movement of ions across cell membranes. Mutations in a single gene are enough to make mosquitoes almost completely resistant to the level of pyrethroids used in insecticides.
explain the importance of studying cytology
the importance of studying cytology are
Explanation:
Cytology is important in modern-day medicine as well. Cytological tests are used to observe human cells to determine the risk of abnormalities and cancer. The Pap smear test looks at cells as opposed to pieces of tissue and is used to screen women for cervical cancer.i hope it will help you
Classify the receptor descriptions or names below based on which neurotransmitter each is associated with. alpha-Adrenergic beta-Adrenergic Muscarinic Nicotinic Only receptor found in parasympathetic synapses Associated with mushroom poison Ultilizes calcium ions as a second messenger Associated with tobacco Norepinephrine Acetylcholine Reset
Answer:
1. Acetylcholine:
- Muscarinic
- Nicotinic
- Associated with mushroom poison
- Only receptor found in parasympathetic synapses
- Associated with tobacco
2. Norepinephrine:
- alpha-Adrenergic
- beta-Adrenergic
- Utilizes calcium ions as a second messenger
Explanation:
Acetylcholine (ACh) is a neurotransmitter that acts in both the central and peripheral nervous systems. Cholinergic receptors are receptors that bind to ACh. Muscarinic receptors are G protein-coupled receptors involved in the parasympathetic nervous system, which play roles in a variety of physiological responses (e.g., ACh binds to muscarinic receptors in the pathophysiology of asthma, leading to an increased mucus secretion). Nicotinic receptors bind to nicotine, while muscarinic receptors bind to muscarin (muscarine is a well-known neurotoxic alkaloid found in certain mushrooms). Nicotine receptors are also called cholinergic receptors since they also respond to ACh. On the other hand, norepinephrine (NE) binds to alpha-adrenergic and beta-adrenergic receptors in different tissues. Both alpha-adrenergic and beta-adrenergic receptors are G-protein coupled receptors. Alpha-adrenergic receptors are involved in the regulation of blood pressure and generating a sympathetic 'fight and flight response'; whereas beta-adrenergic receptors modulate sympathetic responses in the cardiovascular, metabolic, and central nervous systems (NE activates the beta1-receptor). NE can induce Ca2+ release, which is a second messenger that controls a wide variety of cellular processes.
what is defferenciated cell and and undeferenciated cell.with example
Answer:
Differentiated cells refer to the specialized cells in multicellular organisms modified to carry out a particular function, such as transporting a certain substance or executing a specific task, while undifferentiated cells refer to the stem cells capable of giving rise to indefinitely more cells of the same type,.
example of differentiated cell=zygote to embryo then a comlex foetusexample of undifferentiated cell= embryonic stem cell.hope it helpsstay safe healthy and happy.Drag each of the following labels into the appropriate box to identify which motor division of the peripheral nervous system is identified by the given function.an be excitatory or inhibitory on the target organ Principally involved with movement of materials through the body Skeletal muscle activation Intestinal smooth muscle activation Voluntary Sweat gland activation Lacrimal gland activation Principally involved with movement "of" the body principally invvedPiloerector muscle Involuntary activation Somatic Autonomic
Answer:
Somatic: Skeletal muscle activation VoluntaryPrincipally involved with movement "of" the body.Autonomic: Can be excitatory or inhibitory on the target organ. Principally involved with the movement of materials through the body. Intestinal smooth muscle activation. Sweat gland activation Lacrimal gland activation Piloerector muscle Involuntary activation.Explanation:
We can divide the nervous system into the central nervous system, which consists of the brain and spinal cord, and the peripheral nervous system, which consists of all the nerves that are throughout the body carrying information from and to the central nervous system.
We divide the peripheral nervous system into the somatic nervous system and the autonomic nervous system.
The somatic nervous system is the conscious one, that is to say, that we know and control what it does. It is voluntary. It has motor and sensory neurons that carry information to and from the central nervous system. The somatic nervous system is the one that makes us move our muscles to do an action.
The autonomic nervous system is involuntary. In other words, we can not control it consciously. It is the one that controls glands, organs, and smooth muscle, like the one that surrounds the digestive tract to move the food. As we can not consciously control it, this system can work exiting or inhibiting an organ depending on the situation.
The peripheral nervous system is simply divided into 2 types, which are the somatic nervous system and the autonomic nervous system.
SOMATIC
Voluntary principally involved with movement "of" body skeletal muscles activation
AUTONOMIC
Involuntary lacrimal gland activation intestinal smooth muscle activation principally involved with movement "through" body sweat gland activation arrector pili activation can be excitatory or inhibitory on target organThe peripheral nervous system (PNS) is the simply known as the division of the nervous system that has all the nerves that is found outside of the central nervous system (CNS).
Its primary role is to connect the central nervous system to various organs such as the limbs, and skin. simply divided into 2 types, which are the somatic nervous system and the autonomic nervous system.
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One true-breeding line of mice is obese and dark and another is lean and light. Dark is dominant to light, but obese and lean exhibit incomplete dominance. What proportion of offspring from a dihybrid cross should be both dark and intermediate between obese and lean
Answer:
6/16 Intermediate and dark ⇒ 2/16 OoDD + 4/16 OoDd
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
A food product was produced at room temperature (20°C) and its water activity was 0.3. Then it was shipped to a store and its temperature was 30°C during shipping, which of the following could happen?
a. The product water activity will increase
b. The water content of the product do not changed
c. The product may be spoiled faster than expected
d. All of the above
Answer:
Hence the correct answer is All of the above.
Explanation:
With the rise in temperature, the water activity will increase and water movement between molecules will increase and this may allow the expansion of microorganisms leading to the spoilage of food.
Given the latitudinal differences in sunlight intensity, how might you expect the carrying capacity of a plant species found at the equator to compare with that of a plant species found at high latitudes? Explain your answer
Answer:
The carrying capacity of a plant species expect in the equator is higher as compared to the carrying capacity at high Latitudes. This is due to the equator the plants have more light available, so the ecosystem can give them better conditions to survive and reproduce. Remembering that the carrying capacity is the largest population size an ecosystem can support without degrading itself, in the equator would be higher as it can have better conditions of light, so they would survive and reproduce more and the largest population the ecosystem could support would be higher.
Refer to this diagram. Which structure will become the product of translation? 1 2 3 4
Writing an Equation in Slope-Intercept Form
Q
Check
y
Determine the equation for the given line in
slope-intercept form
4
O y = -5x-1
=-1
2
X
-6
-4
-2
2
LO
O y = x+1
O y = 3x+1
O y=-x-1
-2
-4
Hint
Answer:
need a full picture plzzz
Ariella is a 12-year-old whose BMI-for-age is above the 95th percentile. What conclusion could be drawn? a. She is at risk for undernutrition b. Her body fat percentage is in an unhealthy range. c. She is going through a growth spurt. d. She is at risk for future obesity.
Answer:
She is at risk for future obesity
Explanation:
The correct conclusion could be drawn is she is at risk for future obesity. BMI is a body mass index that is derived from the mass and height of the person.
How BMI is calculated?The formula is BMI = kg/m2
Where kg is a person’s weight in kilograms and m² their height in meters squared.
BMI categoriesUnderweight = <18.5Normal weight = 18.5–24.9Overweight = 25–29.9Obesity = BMI of 30 or greaterThus, it is concluded that Ariella is at a risk for future obesity according to her BMI percentile.
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it is usually measured in m/s
Explanation:
The speed of light in vacuum is 299 792 458 meters per second. unit of acceleration is the meter per second per second (m/s2). unit of area is the square meter (m2).
...
Units of Length
10 millimeters (mm) = 1 centimeter (cm)
10 centimeters = 1 decimeter (dm)
10 centimeters = 100 millimeters
10 decimeters = 1 meter (m)